Valve.



O. A. HULTQUIST.

VALVE.

APPLIOA'HOI nun nov. 2:. 1000.

1mm; July 19, 1910.

CHARLES A. HULTQUIST, OF LOWELL, ARIZONA TERRITORY.

VALVE.

specification of Letter! Potent Patented July It), 191 0.

Application tiled November 22, 1009. Serlal No. 529.242.

To all whom it may concern:

Be it known that 1, Cinema; A. Him-rtmrr, a citizen of the United States, residing at. Lowell, in the county of Cochise and Territory of Arizonmhave invented new and useful Improvements in Valves, of which the following is a specification. r

' My invention relates to an improved valve motion, which is especially designed for the operation of hammers, rock-drills, &e., driven by an elastic fluid under iressure.

It consists in a means for ioldmg the valve. in position after it has been moved or tripped by the action of air in the cylinder.

it also comprises details of construction which will be more fully explained by ro lcrence ,to the, accompanying drawings, in whicht Figure l is a sectional elevat on of the cylinder and valve chamber. Fig. 2 is a modification of the device.

A is the cylinder in which the piston it is adapted to reciprocate. 'lhis piston may act as a hammer to operate a roe -drill, or a riveting hammer, or for other equivalent pnrposes where reciprocating motion is requircd.

C is the valve chamber, in which the valve 'is adapted to reciprocate. The valve consists of a stem 1), and the pistons l--..'.-1t, which lit and rcciprtmatc within the valve chamber 4 are the heads of the valve chamber. and either of these may be removed, and the valve removed; the pistons l--2---3 being of uniform diameter so that. the valve may be moved from either end of the valve chest. by removing either of the plugs -l.

The ends or smaller diameters 5 aml (3 of the valve are adapted to reciprocate in chambers 7 in which these ends lit.

8 is the inlet passa 'e for the tluid under pressure, and the. bear 1 moves so as to open communication with either one side or the other of this head. and between it, aml either of the heads 2 or 3. 9 and 9 are ports connecting this internnaliate space with opposite ends of the c linder A; and 10-40 are ports connecting the central portion of the valve chest with the. chambers 7 in the heads 4.

In Fig. 2 l have shown stems 5' and ti projecting inwardly from the heads 4 of the valve chest, and the chambers 7 are formed in the ends of the valve heads 2 and 3 so that in tead of these small piungers being operated with the valve, the valve moves with relation to the fixed plungers, the operation however is essentially the same in both cases.

Ji -ll are iorts opening from the cylinder into the va ve chest exterior to the heads 2 and 3, and lit-12 are the ports opening through the side of the valve chest. and which are exposed by the movements of the heads 2 and 3 so as to alternately exhaust. the actuating "aid from the cndsof the cylinder.

The operation of the device will then be as follows: The valve having the position shown in Fig. 1, the head 3 has been moved to the right so as to open communication between the inlet port 8 and the port 9" which leads to the ri'ght end of the cylin-' der A, while the hem 1 will be in )USltltllt to cut oil the iinpelling lluid from t to ports 9 and 10. The port 10 being opened simultaneouslv with the port 9', the impelling lltiid will pass through this port into the chamber 7 at the right, and behind the plunger 6, at the same time while the fluid is entering the right end of the cylinder A, the pressure in both being the same. T he pr ssure within the cylinder will force the piston B toward the left end of the cylinder, and as the port. 9 is in o )0 communication with the port. 12. the lluit at the left end of the cylindcr will be exhausted through these ports, and when the piston has moved far enough to uncover the port 11, the fluid which has impelled it to the left, will pass through this ant and behind the head 2 of the valve. The area of this head being so much larger than the area of the plunger (3, the ressure will overcome that in the ri ht lttlll chamber 7, and the valve will e immediately forced to the ri ht end of its stroke; thus causing the head to cover and inclose the exhaust port 12, the head 3 to uncover the exhaust port 12, and the head 1 to be moved to the ri ht so as to open communication between t to inlet port 8, the )ort- 9, and the )0ll. 10, which supplies the eft chamber 7 )chind the plan 'er 5. In this manner the valve is ierleet. y balanced and cushioned, and the alternate changing of pressure at opposite ends will autonnitically operate it in unison with the movements of the piston within the main cylinder;

The action of the plnngers 5 and 6 to hold and steady the valve maybe explained as follows: lhe piston or hammer B will always travel past the orts 11 and 11" in its reciprocations, as t e valve requires. 

